Magnesium (24 Hr Urine)

Magnesium (24 Hr Urine) is a biochemical test used to measure the amount of magnesium excreted in urine over a 24-hour period. This test helps evaluate magnesium balance in the body and distinguish between gastrointestinal loss, renal loss, or dietary deficiency. It is particularly useful in patients with unexplained low or high blood magnesium levels, kidney disorders, electrolyte imbalance, muscle cramps, or cardiac rhythm abnormalities. Measuring urinary magnesium excretion provides insight into renal handling of magnesium and aids in diagnosing conditions such as renal tubular disorders or malabsorption syndromes. The test supports accurate diagnosis and guides appropriate treatment planning.